Magnesium nitrate
Structural formula | |||||||||||||||||||
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General | |||||||||||||||||||
Surname | Magnesium nitrate | ||||||||||||||||||
other names |
MAGNESIUM NITRATE ( INCI ) |
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Molecular formula | Mg (NO 3 ) 2 Mg (NO 3 ) 2 · 6H 2 O |
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Brief description |
colorless and odorless solid |
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External identifiers / databases | |||||||||||||||||||
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properties | |||||||||||||||||||
Molar mass | 148.3 g · mol -1 256.4 g · mol -1 (hexahydrate) |
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Physical state |
firmly |
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density |
1.46 g cm −3 (hexahydrate) |
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Melting point |
89 ° C (hexahydrate) |
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boiling point |
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solubility |
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safety instructions | |||||||||||||||||||
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Toxicological data | |||||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Magnesium nitrate is the magnesium salt of nitric acid . It is hygroscopic and has the molecular formula Mg (NO 3 ) 2 .
Occurrence
The hexahydrate of magnesium nitrate occurs naturally as the mineral nitromagnesite .
Manufacturing
Magnesium nitrate can be obtained by reacting magnesium with dinitrogen tetroxide in ethyl acetate .
Magnesium nitrate results from the neutralization of magnesium hydroxide and nitric acid (see also titration , synthesis (chemistry) ).
It is also possible to react magnesium with nitric acid or by reacting magnesium hydroxide with ammonium nitrate .
properties
Magnesium nitrate is a colorless and odorless solid that is readily soluble in water. The hexahydrate has a monoclinic crystal structure with the space group P 2 1 / c (space group no. 14) . At 88.9 ° C this begins to give off its water of crystallization and the compound dissolves (melts) in it.
use
Magnesium nitrate is used as fertilizer , latent heat storage (as hexahydrate) or in the ceramic industry. It is also a building-damaging salt and is used in the dehydration of nitric acid (see also nitrates ).
safety instructions
Magnesium nitrate is labeled with the UN number 1474 and the hazard number 50 ( oxidizing / fire-promoting effect).
Web links
- Magnesium nitrate and similar substances as heat storage
- About magnesium nitrate as a building damaging salt
Individual evidence
- ↑ Entry on MAGNESIUM NITRATE in the CosIng database of the EU Commission, accessed on March 7, 2020.
- ↑ a b c d e f data sheet magnesium nitrate hexahydrate (PDF) from Merck , accessed on August 10, 2012.
- ↑ a b c d Richard C. Ropp: Encyclopedia of the Alkaline Earth Compounds . Newnes, 2012, ISBN 0-444-59553-8 , pp. 217 ( limited preview in Google Book search).
- ↑ a b c d Entry on magnesium nitrate in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
- ↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 912.